/****************************************************************************
 * arch/arm/src/at32/at32_uart.h
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

#ifndef __ARCH_ARM_STC_AT32_AT32_UART_H
#define __ARCH_ARM_STC_AT32_AT32_UART_H

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>
#include <nuttx/serial/serial.h>

#include "chip.h"

#if defined(CONFIG_AT32_AT32F43XX)
#  include "hardware/at32f43xxx_uart.h"
#else
#  error "Unsupported AT32 UART"
#endif

/****************************************************************************
 * Pre-processor Definitions
 ****************************************************************************/

/* Make sure that we have not enabled more U[S]ARTs than are supported by the
 * device.
 */

#if AT32_NUSART < 8 || !defined(CONFIG_AT32_HAVE_UART8)
#  undef CONFIG_AT32_UART8
#endif
#if AT32_NUSART < 7 || !defined(CONFIG_AT32_HAVE_UART7)
#  undef CONFIG_AT32_UART7
#endif
#if AT32_NUSART < 6 || !defined(CONFIG_AT32_HAVE_USART6)
#  undef CONFIG_AT32_USART6
#endif
#if AT32_NUSART < 5 || !defined(CONFIG_AT32_HAVE_UART5)
#  undef CONFIG_AT32_UART5
#endif
#if AT32_NUSART < 4 || !defined(CONFIG_AT32_HAVE_UART4)
#  undef CONFIG_AT32_UART4
#endif
#if AT32_NUSART < 3 || !defined(CONFIG_AT32_HAVE_USART3)
#  undef CONFIG_AT32_USART3
#endif
#if AT32_NUSART < 2
#  undef CONFIG_AT32_USART2
#endif
#if AT32_NUSART < 1
#  undef CONFIG_AT32_USART1
#endif

/* Sanity checks */

#if !defined(CONFIG_AT32_USART1)
#  undef CONFIG_AT32_USART1_SERIALDRIVER
#  undef CONFIG_AT32_USART1_1WIREDRIVER
#endif
#if !defined(CONFIG_AT32_USART2)
#  undef CONFIG_AT32_USART2_SERIALDRIVER
#  undef CONFIG_AT32_USART2_1WIREDRIVER
#endif
#if !defined(CONFIG_AT32_USART3)
#  undef CONFIG_AT32_USART3_SERIALDRIVER
#  undef CONFIG_AT32_USART3_1WIREDRIVER
#endif
#if !defined(CONFIG_AT32_UART4)
#  undef CONFIG_AT32_UART4_SERIALDRIVER
#  undef CONFIG_AT32_UART4_1WIREDRIVER
#endif
#if !defined(CONFIG_AT32_UART5)
#  undef CONFIG_AT32_UART5_SERIALDRIVER
#  undef CONFIG_AT32_UART5_1WIREDRIVER
#endif
#if !defined(CONFIG_AT32_USART6)
#  undef CONFIG_AT32_USART6_SERIALDRIVER
#  undef CONFIG_AT32_USART6_1WIREDRIVER
#endif
#if !defined(CONFIG_AT32_UART7)
#  undef CONFIG_AT32_UART7_SERIALDRIVER
#  undef CONFIG_AT32_UART7_1WIREDRIVER
#endif
#if !defined(CONFIG_AT32_UART8)
#  undef CONFIG_AT32_UART8_SERIALDRIVER
#  undef CONFIG_AT32_UART8_1WIREDRIVER
#endif

/* Check 1-Wire and U(S)ART conflicts */

#if defined(CONFIG_AT32_USART1_1WIREDRIVER) && defined(CONFIG_AT32_USART1_SERIALDRIVER)
#  error Both CONFIG_AT32_USART1_1WIREDRIVER and CONFIG_AT32_USART1_SERIALDRIVER defined
#  undef CONFIG_AT32_USART1_1WIREDRIVER
#endif
#if defined(CONFIG_AT32_USART2_1WIREDRIVER) && defined(CONFIG_AT32_USART2_SERIALDRIVER)
#  error Both CONFIG_AT32_USART2_1WIREDRIVER and CONFIG_AT32_USART2_SERIALDRIVER defined
#  undef CONFIG_AT32_USART2_1WIREDRIVER
#endif
#if defined(CONFIG_AT32_USART3_1WIREDRIVER) && defined(CONFIG_AT32_USART3_SERIALDRIVER)
#  error Both CONFIG_AT32_USART3_1WIREDRIVER and CONFIG_AT32_USART3_SERIALDRIVER defined
#  undef CONFIG_AT32_USART3_1WIREDRIVER
#endif
#if defined(CONFIG_AT32_UART4_1WIREDRIVER) && defined(CONFIG_AT32_UART4_SERIALDRIVER)
#  error Both CONFIG_AT32_UART4_1WIREDRIVER and CONFIG_AT32_UART4_SERIALDRIVER defined
#  undef CONFIG_AT32_UART4_1WIREDRIVER
#endif
#if defined(CONFIG_AT32_UART5_1WIREDRIVER) && defined(CONFIG_AT32_UART5_SERIALDRIVER)
#  error Both CONFIG_AT32_UART5_1WIREDRIVER and CONFIG_AT32_UART5_SERIALDRIVER defined
#  undef CONFIG_AT32_UART5_1WIREDRIVER
#endif
#if defined(CONFIG_AT32_USART6_1WIREDRIVER) && defined(CONFIG_AT32_USART6_SERIALDRIVER)
#  error Both CONFIG_AT32_USART6_1WIREDRIVER and CONFIG_AT32_USART6_SERIALDRIVER defined
#  undef CONFIG_AT32_USART6_1WIREDRIVER
#endif
#if defined(CONFIG_AT32_UART7_1WIREDRIVER) && defined(CONFIG_AT32_UART7_SERIALDRIVER)
#  error Both CONFIG_AT32_UART7_1WIREDRIVER and CONFIG_AT32_UART7_SERIALDRIVER defined
#  undef CONFIG_AT32_UART7_1WIREDRIVER
#endif
#if defined(CONFIG_AT32_UART8_1WIREDRIVER) && defined(CONFIG_AT32_UART8_SERIALDRIVER)
#  error Both CONFIG_AT32_UART8_1WIREDRIVER and CONFIG_AT32_UART8_SERIALDRIVER defined
#  undef CONFIG_AT32_UART8_1WIREDRIVER
#endif

/* Is the serial driver enabled? */

#if defined(CONFIG_AT32_USART1_SERIALDRIVER) || defined(CONFIG_AT32_USART2_SERIALDRIVER) || \
    defined(CONFIG_AT32_USART3_SERIALDRIVER) || defined(CONFIG_AT32_UART4_SERIALDRIVER)  || \
    defined(CONFIG_AT32_UART5_SERIALDRIVER)  || defined(CONFIG_AT32_USART6_SERIALDRIVER) || \
    defined(CONFIG_AT32_UART7_SERIALDRIVER)  || defined(CONFIG_AT32_UART8_SERIALDRIVER)
#  define HAVE_SERIALDRIVER 1
#endif

/* Is the 1-Wire driver? */

#if defined(CONFIG_AT32_USART1_1WIREDRIVER) || defined(CONFIG_AT32_USART2_1WIREDRIVER) || \
    defined(CONFIG_AT32_USART3_1WIREDRIVER) || defined(CONFIG_AT32_UART4_1WIREDRIVER) || \
    defined(CONFIG_AT32_UART5_1WIREDRIVER) || defined(CONFIG_AT32_USART6_1WIREDRIVER) || \
    defined(CONFIG_AT32_UART7_1WIREDRIVER) || defined(CONFIG_AT32_UART8_1WIREDRIVER)
#  define HAVE_1WIREDRIVER 1
#endif

/* Is there a serial console? */

#if defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_AT32_USART1_SERIALDRIVER)
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 1
#  define HAVE_CONSOLE 1
#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_AT32_USART2_SERIALDRIVER)
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 2
#  define HAVE_CONSOLE 1
#elif defined(CONFIG_USART3_SERIAL_CONSOLE) && defined(CONFIG_AT32_USART3_SERIALDRIVER)
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 3
#  define HAVE_CONSOLE 1
#elif defined(CONFIG_UART4_SERIAL_CONSOLE) && defined(CONFIG_AT32_UART4_SERIALDRIVER)
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 4
#  define HAVE_CONSOLE 1
#elif defined(CONFIG_UART5_SERIAL_CONSOLE) && defined(CONFIG_AT32_UART5_SERIALDRIVER)
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 5
#  define HAVE_CONSOLE 1
#elif defined(CONFIG_USART6_SERIAL_CONSOLE) && defined(CONFIG_AT32_USART6_SERIALDRIVER)
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 6
#  define HAVE_CONSOLE 1
#elif defined(CONFIG_UART7_SERIAL_CONSOLE) && defined(CONFIG_AT32_UART7_SERIALDRIVER)
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 7
#  define HAVE_CONSOLE 1
#elif defined(CONFIG_UART8_SERIAL_CONSOLE) && defined(CONFIG_AT32_UART8_SERIALDRIVER)
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  define CONSOLE_UART 8
#  define HAVE_CONSOLE 1
#else
#  undef CONFIG_USART1_SERIAL_CONSOLE
#  undef CONFIG_USART2_SERIAL_CONSOLE
#  undef CONFIG_USART3_SERIAL_CONSOLE
#  undef CONFIG_UART4_SERIAL_CONSOLE
#  undef CONFIG_UART5_SERIAL_CONSOLE
#  undef CONFIG_USART6_SERIAL_CONSOLE
#  undef CONFIG_UART7_SERIAL_CONSOLE
#  undef CONFIG_UART8_SERIAL_CONSOLE
#  define CONSOLE_UART 0
#  undef HAVE_CONSOLE
#endif

/* DMA support is only provided if CONFIG_ARCH_DMA is in the
 * NuttX configuration
 */

#if !defined(HAVE_SERIALDRIVER) || !defined(CONFIG_ARCH_DMA)
#  undef CONFIG_USART1_RXDMA
#  undef CONFIG_USART1_TXDMA
#  undef CONFIG_USART2_RXDMA
#  undef CONFIG_USART2_TXDMA
#  undef CONFIG_USART3_RXDMA
#  undef CONFIG_USART3_TXDMA
#  undef CONFIG_UART4_RXDMA
#  undef CONFIG_UART4_TXDMA
#  undef CONFIG_UART5_RXDMA
#  undef CONFIG_UART5_TXDMA
#  undef CONFIG_USART6_RXDMA
#  undef CONFIG_USART6_TXDMA
#  undef CONFIG_UART7_RXDMA
#  undef CONFIG_UART7_TXDMA
#  undef CONFIG_UART8_RXDMA
#  undef CONFIG_UART8_TXDMA
#endif

/* Disable the DMA configuration on all unused USARTs */

#ifndef CONFIG_AT32_USART1_SERIALDRIVER
#  undef CONFIG_USART1_RXDMA
#  undef CONFIG_USART1_TXDMA
#endif

#ifndef CONFIG_AT32_USART2_SERIALDRIVER
#  undef CONFIG_USART2_RXDMA
#  undef CONFIG_USART2_TXDMA
#endif

#ifndef CONFIG_AT32_USART3_SERIALDRIVER
#  undef CONFIG_USART3_RXDMA
#  undef CONFIG_USART3_TXDMA
#endif

#ifndef CONFIG_AT32_UART4_SERIALDRIVER
#  undef CONFIG_UART4_RXDMA
#  undef CONFIG_UART4_TXDMA
#endif

#ifndef CONFIG_AT32_UART5_SERIALDRIVER
#  undef CONFIG_UART5_RXDMA
#  undef CONFIG_UART5_TXDMA
#endif

#ifndef CONFIG_AT32_USART6_SERIALDRIVER
#  undef CONFIG_USART6_RXDMA
#  undef CONFIG_USART6_TXDMA
#endif

#ifndef CONFIG_AT32_UART7_SERIALDRIVER
#  undef CONFIG_UART7_RXDMA
#  undef CONFIG_UART7_TXDMA
#endif

#ifndef CONFIG_AT32_UART8_SERIALDRIVER
#  undef CONFIG_UART8_RXDMA
#  undef CONFIG_UART8_TXDMA
#endif

/* Is DMA available on any (enabled) USART? */

#undef SERIAL_HAVE_RXDMA
#if defined(CONFIG_USART1_RXDMA) || defined(CONFIG_USART2_RXDMA) || \
    defined(CONFIG_USART3_RXDMA) || defined(CONFIG_UART4_RXDMA)  || \
    defined(CONFIG_UART5_RXDMA)  || defined(CONFIG_USART6_RXDMA) || \
    defined(CONFIG_UART7_RXDMA)  || defined(CONFIG_UART8_RXDMA)
#  define SERIAL_HAVE_RXDMA 1
#endif

/* Is TX DMA available on any (enabled) USART? */

#undef SERIAL_HAVE_TXDMA
#if defined(CONFIG_USART1_TXDMA) || defined(CONFIG_USART2_TXDMA) || \
  defined(CONFIG_USART3_TXDMA) || defined(CONFIG_UART4_TXDMA)  ||   \
  defined(CONFIG_UART5_TXDMA)  || defined(CONFIG_USART6_TXDMA) ||   \
  defined(CONFIG_UART7_TXDMA)  || defined(CONFIG_UART8_TXDMA)
#  define SERIAL_HAVE_TXDMA 1
#endif

/* Is RX DMA used on the console UART? */

#undef SERIAL_HAVE_CONSOLE_RXDMA
#if defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_USART1_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_USART2_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#elif defined(CONFIG_USART3_SERIAL_CONSOLE) && defined(CONFIG_USART3_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#elif defined(CONFIG_UART4_SERIAL_CONSOLE) && defined(CONFIG_UART4_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#elif defined(CONFIG_UART5_SERIAL_CONSOLE) && defined(CONFIG_UART5_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#elif defined(CONFIG_USART6_SERIAL_CONSOLE) && defined(CONFIG_USART6_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#elif defined(CONFIG_UART7_SERIAL_CONSOLE) && defined(CONFIG_UART7_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#elif defined(CONFIG_UART8_SERIAL_CONSOLE) && defined(CONFIG_UART8_RXDMA)
#  define SERIAL_HAVE_CONSOLE_RXDMA 1
#endif

/* Is TX DMA used on the console UART? */

#undef SERIAL_HAVE_CONSOLE_TXDMA
#if defined(CONFIG_USART1_SERIAL_CONSOLE) && defined(CONFIG_USART1_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#elif defined(CONFIG_USART2_SERIAL_CONSOLE) && defined(CONFIG_USART2_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#elif defined(CONFIG_USART3_SERIAL_CONSOLE) && defined(CONFIG_USART3_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#elif defined(CONFIG_UART4_SERIAL_CONSOLE) && defined(CONFIG_UART4_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#elif defined(CONFIG_UART5_SERIAL_CONSOLE) && defined(CONFIG_UART5_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#elif defined(CONFIG_USART6_SERIAL_CONSOLE) && defined(CONFIG_USART6_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#elif defined(CONFIG_UART7_SERIAL_CONSOLE) && defined(CONFIG_UART7_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#elif defined(CONFIG_UART8_SERIAL_CONSOLE) && defined(CONFIG_UART8_TXDMA)
#  define SERIAL_HAVE_CONSOLE_TXDMA 1
#endif

/* Is RX DMA used on all (enabled) USARTs */

#define SERIAL_HAVE_ONLY_RXDMA 1
#if defined(CONFIG_AT32_USART1) && !defined(CONFIG_USART1_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#elif defined(CONFIG_AT32_USART2) && !defined(CONFIG_USART2_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#elif defined(CONFIG_AT32_USART3) && !defined(CONFIG_USART3_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#elif defined(CONFIG_AT32_UART4) && !defined(CONFIG_UART4_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#elif defined(CONFIG_AT32_UART5) && !defined(CONFIG_UART5_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#elif defined(CONFIG_AT32_USART6) && !defined(CONFIG_USART6_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#elif defined(CONFIG_AT32_UART7) && !defined(CONFIG_UART7_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#elif defined(CONFIG_AT32_UART8) && !defined(CONFIG_UART8_RXDMA)
#  undef SERIAL_HAVE_ONLY_RXDMA
#endif

/* Is TX DMA used on all (enabled) USARTs */

#define SERIAL_HAVE_ONLY_TXDMA 1
#if defined(CONFIG_AT32_USART1) && !defined(CONFIG_USART1_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#elif defined(CONFIG_AT32_USART2) && !defined(CONFIG_USART2_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#elif defined(CONFIG_AT32_USART3) && !defined(CONFIG_USART3_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#elif defined(CONFIG_AT32_UART4) && !defined(CONFIG_UART4_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#elif defined(CONFIG_AT32_UART5) && !defined(CONFIG_UART5_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#elif defined(CONFIG_AT32_USART6) && !defined(CONFIG_USART6_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#elif defined(CONFIG_AT32_UART7) && !defined(CONFIG_UART7_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#elif defined(CONFIG_AT32_UART8) && !defined(CONFIG_UART8_TXDMA)
#  undef SERIAL_HAVE_ONLY_TXDMA
#endif

#undef SERIAL_HAVE_ONLY_DMA
#if defined(SERIAL_HAVE_ONLY_RXDMA) && defined(SERIAL_HAVE_ONLY_TXDMA)
#  define SERIAL_HAVE_ONLY_DMA 1
#endif

/* No DMA ops */

#undef SERIAL_HAVE_NODMA_OPS
#if defined(CONFIG_AT32_USART1) && !defined(CONFIG_USART1_RXDMA) &&   \
    !defined(CONFIG_USART1_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#elif defined(CONFIG_AT32_USART2) && !defined(CONFIG_USART2_RXDMA) && \
    !defined(CONFIG_USART2_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#elif defined(CONFIG_AT32_USART3) && !defined(CONFIG_USART3_RXDMA) && \
    !defined(CONFIG_USART3_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#elif defined(CONFIG_AT32_UART4) && !defined(CONFIG_UART4_RXDMA) &&  \
    !defined(CONFIG_UART4_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#elif defined(CONFIG_AT32_UART5) && !defined(CONFIG_UART5_RXDMA) &&  \
    !defined(CONFIG_UART5_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#elif defined(CONFIG_AT32_USART6) && !defined(CONFIG_USART6_RXDMA) && \
    !defined(CONFIG_USART6_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#elif defined(CONFIG_AT32_UART7) && !defined(CONFIG_UART7_RXDMA) &&  \
    !defined(CONFIG_UART7_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#elif defined(CONFIG_AT32_UART8) && !defined(CONFIG_UART8_RXDMA) &&  \
    !defined(CONFIG_UART8_TXDMA)
#  define SERIAL_HAVE_NODMA_OPS
#endif

/* RX+TX DMA ops */

#undef SERIAL_HAVE_RXTXDMA_OPS
#if defined(CONFIG_USART1_RXDMA) && defined(CONFIG_USART1_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#elif defined(CONFIG_USART2_RXDMA) && defined(CONFIG_USART2_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#elif defined(CONFIG_USART3_RXDMA) && defined(CONFIG_USART3_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#elif defined(CONFIG_UART4_RXDMA) && defined(CONFIG_UART4_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#elif defined(CONFIG_UART5_RXDMA) && defined(CONFIG_UART5_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#elif defined(CONFIG_USART6_RXDMA) && defined(CONFIG_USART6_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#elif defined(CONFIG_UART7_RXDMA) && defined(CONFIG_UART7_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#elif defined(CONFIG_UART8_RXDMA) && defined(CONFIG_UART8_TXDMA)
#  define SERIAL_HAVE_RXTXDMA_OPS
#endif

/* TX DMA ops */

#undef SERIAL_HAVE_TXDMA_OPS
#if !defined(CONFIG_USART1_RXDMA) && defined(CONFIG_USART1_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#elif !defined(CONFIG_USART2_RXDMA) && defined(CONFIG_USART2_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#elif !defined(CONFIG_USART3_RXDMA) && defined(CONFIG_USART3_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#elif !defined(CONFIG_UART4_RXDMA) && defined(CONFIG_UART4_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#elif !defined(CONFIG_UART5_RXDMA) && defined(CONFIG_UART5_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#elif !defined(CONFIG_USART6_RXDMA) && defined(CONFIG_USART6_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#elif !defined(CONFIG_UART7_RXDMA) && defined(CONFIG_UART7_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#elif !defined(CONFIG_UART8_RXDMA) && defined(CONFIG_UART8_TXDMA)
#  define SERIAL_HAVE_TXDMA_OPS
#endif

/* RX DMA ops */

#undef SERIAL_HAVE_RXDMA_OPS
#if defined(CONFIG_USART1_RXDMA) && !defined(CONFIG_USART1_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#elif defined(CONFIG_USART2_RXDMA) && !defined(CONFIG_USART2_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#elif defined(CONFIG_USART3_RXDMA) && !defined(CONFIG_USART3_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#elif defined(CONFIG_UART4_RXDMA) && !defined(CONFIG_UART4_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#elif defined(CONFIG_UART5_RXDMA) && !defined(CONFIG_UART5_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#elif defined(CONFIG_USART6_RXDMA) && !defined(CONFIG_USART6_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#elif defined(CONFIG_UART7_RXDMA) && !defined(CONFIG_UART7_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#elif defined(CONFIG_UART8_RXDMA) && !defined(CONFIG_UART8_TXDMA)
#  define SERIAL_HAVE_RXDMA_OPS
#endif

/* Is RS-485 used? */

#if defined(CONFIG_USART1_RS485) || defined(CONFIG_USART2_RS485) || \
    defined(CONFIG_USART3_RS485) || defined(CONFIG_UART4_RS485)  || \
    defined(CONFIG_UART5_RS485)  || defined(CONFIG_USART6_RS485)  || \
    defined(CONFIG_UART7_RS485)  || defined(CONFIG_UART8_RS485)
#  define HAVE_RS485 1
#endif

#ifdef HAVE_RS485
#  define USART_CR1_USED_INTS    (USART_CTRL1_RDBFIEN | USART_CTRL1_TDBEIEN | USART_CTRL1_PERRIEN | USART_CTRL1_TDCIEN)
#else
#  define USART_CR1_USED_INTS    (USART_CTRL1_RDBFIEN | USART_CTRL1_TDBEIEN | USART_CTRL1_PERRIEN)
#endif

/****************************************************************************
 * Public Types
 ****************************************************************************/

/****************************************************************************
 * Public Data
 ****************************************************************************/

#ifndef __ASSEMBLY__

#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif

/****************************************************************************
 * Public Functions Prototypes
 ****************************************************************************/

/****************************************************************************
 * Name: at32_serial_get_uart
 *
 * Description:
 *   Get serial driver structure for AT32 USART
 *
 ****************************************************************************/

uart_dev_t *at32_serial_get_uart(int uart_num);

/****************************************************************************
 * Name: at32_serial_dma_poll
 *
 * Description:
 *   Must be called periodically if any AT32 UART is configured for DMA.
 *   The DMA callback is triggered for each fifo size/2 bytes, but this can
 *   result in some bytes being transferred but not collected if the incoming
 *   data is not a whole multiple of half the FIFO size.
 *
 *   May be safely called from either interrupt or thread context.
 *
 ****************************************************************************/

#ifdef SERIAL_HAVE_RXDMA
void at32_serial_dma_poll(void);
#endif

#undef EXTERN
#if defined(__cplusplus)
}
#endif

#endif /* __ASSEMBLY__ */
#endif /* __ARCH_ARM_STC_AT32_AT32_UART_H */
